As instructed, one way to run react native apps on your android devise is to using expo. Install expo client in your android devise and scan the above obtained QR code.

Step6: Eject the project
If you want to run android emulator using android studio, come out of the current command line by pressing ctrl+c.

Then, execute run eject command as

This prompts you options to eject, select the first one using arrows and press enter.

Then, you should suggest the name of the app on home screen and project name of the Android studio and Xcode projects.